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From: paulg@frith.uucp (Gregory R Paul)
Newsgroups: comp.dcom.modems
Subject: Re: Why do they insist on power cubes???
Message-ID: <1991Jan11.012923.814@msuinfo.cl.msu.edu>
Date: 11 Jan 91 01:29:23 GMT
References: <6597.2788009C@zswamp.fidonet.org>
Sender: news@msuinfo.cl.msu.edu
Organization: Michigan State University, College of Engineering
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In article <6597.2788009C@zswamp.fidonet.org> root@zswamp.fidonet.org (Geoffrey Welsh) writes:
>Larry Lippman (larry@kitty.UUCP ) wrote:
>
> >In article <191@raysnec.UUCP>, shwake@raysnec.UUCP (Ray 
> >Shwake) writes:
>>       What began as an annoyance has become a logistic mess. Some years
>> ago, manufacturers of external modems like Hayes moved their power supplies
>> to external power cubes which fit directly into the power line.
>
> >        There is a rather attractive design reason for going 
> >to external
> >power cubes - it vastly simplifies obtaining UL, CSA and VDE 
> >approval on
> >the modem since there is no AC power line voltage in the 
> >modem enclosure.
>
>   I'm sure it makes it much easier to engineer a reliable modem.  Many moons 
>ago, I owned a Prometheus Promodem 1200G (don't laugh - it was state of the art 
>at the time!) and I was very pleased with the modem except that it had an 
>internal power supply and tended to overheat and malfunction if left on all the 
>time.
> 
   I'm surprised that no one has mentioned that silly modem that Apple made
a while back (I at least hope it was a while back now..) that had the actual
prongs on the modem itself and was basically designed to dangle from a wall
outlet.  

>
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--
Greg Paul                | Electrical/Computer Engineer in search of a job..
paulg@frith.egr.msu.edu  |
Case Center Consultant   | "and she never had dreams...
sysop:  Sietch Tabr      |        so they never came true.."